As i wrote on the title, he can't join the LAN server for some reason, we tried with the vanilla version and works fine, we did the same with the forge without mods and works without problems.
When he try to join with the modpack made by me the game sometimes say: "Timed out" sometimes: "internal exception: java.lang.outofmemoryerror: java heap space" or "Failed to log in: The authentication servers are currently not reachable. Please try again." we tried to use Essential Mod and with Port Forwarding but we didn't solve nothing, we're getting crazy, please give us an help.
I copied the logs from my minecraft but i have no idea if this is the logs you guys need to see to help us, if this is the wrong log please lemme know where is the correct one.
Thank's <3
https://gist.github.com/Prajiad/4dba180bf0b8e776a151e50d0273d2e8